KR20140098438A - Organic Light Emitting Display integrated Touch Screen Panel - Google Patents

Abstract

According to an embodiment of the present invention, provided is an organic light emitting display integrated with a touch screen panel capable of using control lines arranged on the panel of the organic light emitting display as a driving electrode of a mutual capacitive touch screen panel and inputting a signal applied to the control lines in a touch recognition operation to be synchronized with a signal applied to the display panel to prevent an influence on a display. Also, according to an embodiment of the present invention, the organic light emitting display integrated with the touch screen panel may improve touch recognition sensitivity by electrically connecting the control lines used as the driving electrode of the touch screen panel to auxiliary wires which are arranged near a sensing electrode of the touch screen panel.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic light-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic light emitting display, and more particularly to a touch screen panel integrated organic light emitting display.

The touch screen panel is an input device that allows a user to input a command by selecting an instruction displayed on a screen of a video display device or the like as a human hand or an object.

To this end, the touch screen panel is provided on the front face of the image display device and converts the contact position, which is in direct contact with a human hand or an object, into an electrical signal. Thus, the instruction content selected at the contact position is accepted as the input signal.

Such a touch screen panel can be replaced with a separate input device connected to the image display device such as a keyboard and a mouse, and thus the use range thereof is gradually expanding.

The touch screen panel of the capacitive type is known as a resistive film type, a light sensing type, and an electrostatic capacity type. Among these, And detects the change in the electrostatic capacity to be formed with the other sensing pattern or the ground electrode of the sensor, thereby converting the contact position into an electrical signal.

Such a touch screen panel is generally attached to the outer surface of a flat panel display device such as a liquid crystal display device or an organic light emitting display device and is often commercialized.

However, when the touch screen panel is attached to the outer surface of the flat panel display device of the touch screen panel, an adhesive layer between the touch screen panel and the flat panel display device is required. Since a manufacturing process of the touch screen panel is required separately from the flat panel display device, There is a disadvantage in that the process cost is increased.

Further, in the conventional structure, since the touch screen panel is attached to the outer surface of the flat panel display device, the entire thickness of the flat panel display device is increased.

In an embodiment of the present invention, the control lines arranged in the panel of the organic light emitting display device are used as driving electrodes of the mutual capacitive touch screen panel, and a signal applied to the control lines does not affect the display The present invention provides a touch screen panel integrated organic electroluminescent display device which is input in synchronization with a signal applied to a display panel.

In addition, the embodiment of the present invention electrically connects the control lines used as the driving electrodes of the touch screen panel with the auxiliary wirings arranged close to the sensing electrodes of the touch screen panel, thereby improving the touch recognition sensitivity And an object of the present invention is to provide a touch screen panel integrated organic electroluminescent display device.

According to an aspect of the present invention, there is provided a touch screen panel integrated organic light emitting display device including a plurality of pixels, a plurality of signal lines and control lines connected to the pixels, and; A second substrate positioned on the first substrate to seal the first substrate and having first electrodes of the touch screen panel arranged on one surface thereof; And auxiliary wirings electrically connected to the control lines and formed at a position closer to the first electrodes than the control lines, and the control lines and the auxiliary wirings intersect with the first electrodes And the second electrode of the touch screen panel.

The auxiliary wires may be formed in the same layer as the anode electrode of the organic light emitting diode included in the pixel and may be formed of the same material as the anode electrode. .

The auxiliary wirings may be formed separately from the anode electrode, and at least one protrusion protruding into a region between the anode electrodes may be further formed.

The control lines may include a plurality of control lines adjacent to each other, a plurality of control lines constituting the group operate as a second electrode of the touch screen panel, And the second electrode is a driving electrode of the touch screen panel.

The first electrodes may be formed on a display region of a second substrate corresponding to a region where the pixels are formed, and the first electrodes may be formed on a non-display region located outside the display region through a first touch pad portion The sensing lines are further connected to the touch driving circuit.

The control lines are connected to the touch driving circuit through a second touch pad portion formed on a non-display region of the first substrate.

The first touch pad portion formed on the second substrate is connected to the same touch driving circuit as the second touch pad portion formed on the first substrate.

In addition, the control lines are initialization drive control lines that provide an initialization voltage to each pixel.

Each of the pixels may include an organic light emitting diode; A first transistor for controlling the amount of current supplied to the organic light emitting diode and for initializing a voltage of the gate electrode by an initialization voltage; And a second transistor connected between a gate electrode of the first transistor and a control line for providing an initialization voltage.

In addition, the initialization voltage applied to the control line is a low-level voltage lower than the data signal applied to each pixel, and the initialization voltage is sequentially applied to the plurality of control lines operating as the second electrode of the touch screen panel And a high level voltage may be applied to the groups of the plurality of control lines other than the group of the plurality of control lines to which the initialization voltage is applied.

In addition, the cathode electrode of the organic light emitting diode provided between the plurality of auxiliary wirings arranged on the first substrate and the first electrodes formed on one surface of the second substrate, An opening is formed in an area overlapping with the opening.

According to the embodiments of the present invention, by using the control lines arranged in the panel of the organic light emitting display device as the driving electrodes of the capacitive touch screen panel, There is an advantage of realizing an electroluminescent display device.

Further, there is an advantage that a display and a touch recognition operation can be performed simultaneously by being input in synchronization with a signal applied to the display panel so that a signal applied to the control lines does not affect a display during a touch recognition operation.

Further, there is an advantage that the control lines used as the driving electrodes of the touch screen panel are electrically connected to the auxiliary lines arranged at positions close to the sensing electrodes of the touch screen panel, thereby improving the touch recognition sensitivity.

1 is an exploded top view of a touch screen panel integrated organic light emitting display device according to an embodiment of the present invention.
Figure 2 is a circuit diagram of one embodiment of the pixel shown in Figure 1;
3 is a waveform diagram of a driving signal supplied to the pixel shown in Fig.
4 is a cross-sectional view of a portion of a touch screen panel integrated organic light emitting display device according to an exemplary embodiment of the present invention.
5A and 5B are plan views schematically showing a part of auxiliary wirings according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is an exploded top view of a touch screen panel integrated organic electroluminescent display device according to an embodiment of the present invention.

The present invention is directed to an organic light emitting display device in which a touch screen panel is integrated, in which first electrodes (sensing electrodes) 212 of a touch screen panel are connected to an upper substrate 200 And the second electrodes (driving electrodes) of the touch screen panel are implemented as control lines 112 arranged on the lower substrate 100 of the organic light emitting display device.

At this time, the upper substrate 200 functions as an encapsulating substrate of an organic light emitting display, and may be formed of a glass material or a thin film having a flexible characteristic.

In addition, one surface of the upper substrate 200 may be formed on the outer surface of the upper substrate, and one surface of the upper substrate illustrated in FIG. 1 corresponds to the outer surface of the upper substrate.

However, this is an embodiment of the present invention, and the embodiment of the present invention is not limited thereto. That is, the first electrodes 212 of the touch screen panel may be formed on the inner surface of the upper substrate 200.

The structure of the embodiment of the present invention will be described in more detail with reference to FIG.

An embodiment of the present invention is a method of manufacturing a touch screen panel in which a plurality of pixels 120 formed on a display region 300 of a lower substrate 100 are provided with a plurality of pixels 120 on a surface of an upper substrate 200, One touch screen panel integrated type touch panel in which sensing lines 214 connecting the first electrodes 212 and the first electrodes 212 to an external touch driving circuit (not shown) through the first touch pad portion 119a are formed, Organic electroluminescent display device.

The first electrodes 212 are formed on the display region 300 and the sensing lines 214 are formed on the non-display region located outside the display region 300.

A plurality of signal lines and control lines are connected to each of the pixels 120 formed on the display region 300 of the lower substrate 100. In FIG. 1, the scanning lines 114, the data lines 118, And an array of initialization drive control lines 112 as control lines. Although the emission control lines may be additionally arranged in the pixels 120, the emission control lines are not shown for convenience of description.

The initialization drive control lines 112 are arranged in a first direction (X-axis direction) in parallel with the scan lines 114, and a plurality of pixels formed in a row line, like the scan lines, Initialization drive control lines.

The signal lines 114 and 118 and the control lines 112 are connected to the pad portions 118 and 119b, that is, the driving pad portion 118 and the second touch pad portion 119b, A data driver circuit, a touch driver circuit, or the like, which is a driving circuit of the liquid crystal display device.

The first touch pad portion 119a formed on the upper substrate 200 is connected to the same touch driving circuit (not shown) as the second touch pad portion 119b formed on the lower substrate 100. [

Therefore, when the touch driving circuit is electrically connected to the second touch pad portion 119b formed on the lower substrate by a flexible circuit board (FPCB), the first touch pad portion 119a formed on the upper substrate A conductive connecting member (not shown), for example, is connected to a second touch pad portion 119b formed on the lower substrate through a conductive ball or the like, so that a separate FPCB does not come in contact with the first touch pad portion 119a And may be electrically connected to the touch driving circuit.

The driving electrode (second electrode) of the touch screen panel corresponding to the first electrodes 212 of the touch screen panel as the sensing electrode formed on one surface of the upper substrate 200 is connected to the lower substrate 100 As the control lines 112 arranged on the display panel 110. [

That is, as shown in the drawing, the first electrodes 212 and the control lines 112 as the second electrodes are arranged in a direction intersecting with each other to form a plurality of sensing cells around each intersection.

For example, when the first electrodes 212 are arranged in a second direction (Y-axis direction), the second electrodes 112 are arranged in a first direction (X-axis direction) intersecting with the first electrodes 212.

1, since the first electrodes 212 as the sensing electrodes formed on the upper substrate 200 have a significantly wider width than the control lines 112 formed on the lower substrate 100, The control lines 112 may include a plurality of adjacent control lines 112, and the plurality of control lines may form a driving electrode.

However, in order to implement touch recognition through the sensing cells, a signal applied to the group of control lines 112, which operates as the driving electrode (second electrode) during a touch recognition operation, is applied to each pixel The input signal should be synchronized with the input signal.

The circuit configuration of the pixel according to the embodiment of the present invention and the waveform of the driving signal supplied to the pixel for implementing the same will be described in more detail with reference to FIG. 2 and FIG.

FIG. 2 is a circuit diagram of an embodiment of the pixel shown in FIG. 1, and FIG. 3 is a waveform diagram of a driving signal supplied to the pixel shown in FIG.

However, the pixel structure shown in FIG. 2 is one embodiment, and the pixel structure according to the embodiment of the present invention is not limited thereto.

2, a pixel 120 according to an exemplary embodiment of the present invention includes an organic light emitting diode (OLED), a data line Dm, scan lines Sn-1 and Sn, a light emission control line En, And a pixel circuit 142 connected to the initialization drive control line 112 for supplying a voltage Vint to control the amount of current supplied to the organic light emitting diode OLED.

The anode electrode of the organic light emitting diode (OLED) is connected to the pixel circuit 142, and the cathode electrode is connected to the second power source ELVSS. Here, the voltage value of the second power ELVSS is set to be lower than the voltage value of the first power ELVDD. The organic light emitting diode OLED generates light having a predetermined luminance corresponding to the amount of current supplied from the pixel circuit 142.

The pixel circuit 142 controls the amount of current supplied to the organic light emitting diode OLED in response to the data signal supplied to the data line Dm when the scan signal is supplied to the scan line Sn. To this end, the pixel circuit 142 includes first through sixth transistors M1 through M6 and a storage capacitor Cst.

The first electrode of the fourth transistor M4 is connected to the data line Dm, and the second electrode of the fourth transistor M4 is connected to the first node N1. The gate electrode of the fourth transistor M4 is connected to the nth scan line Sn. The fourth transistor M4 is turned on when a scan signal is supplied to the nth scan line Sn and supplies a data signal supplied to the data line Dm to the first node N1.

The first electrode of the first transistor M1 is connected to the first node N1 and the second electrode of the first transistor M1 is connected to the first electrode of the sixth transistor M6. The gate electrode of the first transistor M1 is connected to the second node N2. The first transistor M1 supplies a current corresponding to a voltage charged in the storage capacitor Cst to the organic light emitting diode OLED.

The first electrode of the third transistor M3 is connected to the second electrode of the second transistor M2, and the second electrode of the third transistor M3 is connected to the second node N2. The gate electrode of the third transistor M3 is connected to the nth scan line Sn. The third transistor M3 is turned on when the scan signal is supplied to the nth scan line Sn to connect the first transistor M1 in a diode form.

The second transistor M2 is connected between the second node N2 and the initializing voltage Vint. The gate electrode of the second transistor M2 is connected to the (n-1) th scan line Sn-1. The second transistor M2 is turned on when a scan signal is supplied to the (n-1) th scan line Sn-1 and supplies the initialization voltage Vint to the second node N2.

A first electrode of the fifth transistor M5 is connected to the first power source ELVDD, and a second electrode of the fifth transistor M5 is connected to the first node N1. The gate electrode of the fifth transistor M5 is connected to the emission control line En. The fifth transistor M5 is turned on when the emission control signal is not supplied from the emission control line En to electrically connect the first power ELVDD and the first node N1.

The first electrode of the sixth transistor M6 is connected to the second electrode of the first transistor M1 and the second electrode of the sixth transistor M6 is connected to the anode electrode of the organic light emitting diode OLED. The gate electrode of the sixth transistor M6 is connected to the emission control line En. The sixth transistor M6 is turned on when the emission control signal is not supplied and supplies the current supplied from the first transistor M1 to the organic light emitting diode OLED.

Thus, an operation of displaying a predetermined image is performed through the configuration of the pixel shown in FIG. 2 and the application of the signal.

In this case, the initialization voltage Vint serves to initialize the second node N2. For this purpose, the initialization voltage Vint must be set to a lower voltage than the data signal.

However, in the embodiment of the present invention, the initialization drive control lines 112 to which the initialization voltage is applied also serve as driving electrodes of the touch screen panel.

Therefore, the initialization voltage Vint applied to the initialization drive control lines 112 is not always applied as a low-level voltage lower than the data signal, but is applied to the initialization drive control lines 112 operating as drive electrodes And the low level voltage is sequentially applied to the predetermined group as a touch driving signal.

In FIG. 3, for example, 40 initialization drive control lines are grouped into a plurality of initialization drive control lines 112 arranged in the first direction (X axis direction) to form one group as one drive electrode (second electrode) Will be described.

That is, the first to 40th initialization drive control lines operate as a first drive electrode, the 41st to 80th initialization drive control lines operate as a second drive electrode, and then the same number of initialization drive control lines Each group operates as a subsequent driving electrode.

At this time, the initialization drive control lines 112 are arranged in a first direction (X-axis direction) in parallel with the scan lines Sn and Sn-1, and a plurality of pixels formed in the same row as the scan lines Each connected to one initialization drive control line.

Accordingly, a low-level initialization voltage Vint is applied only to the 40 row lines connected to the respective driving electrodes while the scanning signal S (n-1) is applied, and the low- Is applied.

Therefore, as shown in FIG. 3, the low-level initialization voltage applied to each of the driving electrodes is sequentially applied to each initialization driving control line group, so that it can be used as a driving signal of the touch screen panel.

In addition, since the initialization voltage is applied to the pixels connected to the row lines to which the scan signal S (n-1) is applied, the initialization of the second node N2 of the pixel shown in FIG. 2 is performed Since the pixels connected to the row lines to which the scan signal is not yet applied are not yet written to the data, the initialization voltage of the low level is not applied, and even if a high level voltage is applied, Is not.

As a result, the initialization voltage of the low level is synchronized with the scan signals applied to the row lines corresponding to the respective driving electrode groups, sequentially as shown in the signal waveform of FIG. 3, thereby simultaneously implementing the display and the touch recognition operation .

The sensing electrodes 212 formed on the upper substrate 200 have a significantly wider width than the driving electrodes formed on the lower substrate 100, that is, the initialization driving control lines 112 Therefore, the touch sensing sensitivity may be reduced as compared with the touch screen panel having the sensing electrodes and the driving electrodes having the same width.

In addition, the distance between the initialization drive control lines 112 and the sensing electrodes 212 may be too great to cause a decrease in the sensitivity of the touch sensing.

In order to overcome such disadvantages, in the embodiment of the present invention, the initialization driving control lines 112 used as the driving electrodes are arranged close to the sensing electrodes 212 and are wider than the initialization driving control lines 112 And the auxiliary wirings having a predetermined width are electrically connected to each other.

4 is a cross-sectional view of a portion of a touch screen panel integrated organic light emitting display device according to an exemplary embodiment of the present invention.

5A and 5B are plan views schematically showing a part of auxiliary wirings according to an embodiment of the present invention.

4 illustrates an organic light emitting diode (OLED) 400, a transistor connected thereto, and an initialization driving control line 112 operating as a driving electrode of a touch screen panel, among the pixels shown in FIG.

Referring to FIG. 4, a buffer layer 300 is formed on a lower substrate 100. In this case, the lower substrate 100 may be a glass, plastic, quartz, silicon or metal substrate. The buffer layer 300 may be formed of a silicon oxide (SiO 2), a silicon nitride (SiNx), a silicon oxynitride Lt; / RTI >

A semiconductor layer 104 pattern is formed on the buffer layer 300 and may be an amorphous silicon film (a-Si) or a polycrystalline silicon film (poly-Si) crystallizing an amorphous silicon film. Preferably, the semiconductor layer 104 is a polysilicon film having a high charge mobility.

A gate insulating layer 310 is formed on the entire surface of the substrate including the semiconductor layer 104. The gate insulating layer 310 may be a silicon oxide layer (SiO2), a silicon nitride layer (SiNx), a silicon oxynitride layer (SiO2Nx), or a multilayer thereof.

A gate electrode 106 of the transistor is formed in an area on the gate insulating film 310 overlapping with the semiconductor layer 104. The gate electrode 106 is formed in the same layer as the gate electrode 106, (112) is also formed.

At this time, the gate lines 106 and the initialization drive control lines 112 may be formed and the scan lines (114 of FIG. 1) may be formed.

A conductive impurity (n + ion or p + ion) is injected into the semiconductor layer 104 using the gate electrode 106 as a mask to form a source in a region not overlapping with the gate electrode 106 on the semiconductor layer 104 / Drain regions 104a / 104c. At this time, a channel region 104b is defined between the source / drain regions 104a / 104c.

An interlayer insulating layer 320 is formed on the entire surface of the lower substrate 100 on the gate electrode 106 and the initialization drive control line 112. The interlayer insulating layer 320 and the semiconductor layer 104 are formed.

A conductive film is deposited on the interlayer insulating film 320 on which the contact hole is formed and patterned to form the source / drain electrodes 107 and 108 and the data line 116 of the transistor.

Here, the semiconductor layer 104, the gate insulating film 310, the gate electrode 106, the source electrode 107, and the drain electrode 108 form a transistor. The transistor may be a light emitting control transistor M6 for supplying a predetermined driving current to the organic light emitting diode OLED 400 in the case of the pixel structure shown in FIG. 2, but the present invention is not limited thereto .

A passivation film 330 is formed on the entire surface of the lower substrate 100 including the source, drain electrodes 107 and 108 and the data lines 116 patterned with the conductive film. The passivation film 330 may be formed of a silicon oxide film (SiO2), a silicon nitride film (SiNx), or a multilayer thereof. Preferably, the passivation film 330 effectively blocks gas and moisture to protect the lower transistor, and includes an abundance of hydrogen to protect incomplete bonds existing in the grain boundary of the polysilicon film (SiNx). ≪ / RTI >

In addition, a planarizing film 340 made of an organic film that can alleviate the level difference is formed on the passivation film 330. The planarization layer 340 may be a BCB (benzocyclobutene) layer, a polyimide layer, or a polyacrylate layer.

At this time, a first via hole 150 is formed in the passivation film 330 and the planarization layer 340 which overlap the drain electrode 108 of the transistor, and the drain electrode 108 is exposed through the first via hole 150.

The anode electrode 410 of the organic light emitting diode OLED is formed on the planarization layer 340 including the first via hole 150 so as to be electrically connected to the exposed drain electrode 108.

The anode electrode 410 may be formed using a conductive film having a light reflection characteristic. For example, the light reflective conductive film may be a high work function Ag, Al, Ni, Pt, Pd or an alloy film thereof, May be Mg, Ca, Al, Ag, Ba, or an alloy thereof.

Alternatively, if a reflective film pattern (not shown) is further formed under the anode electrode 410 before the anode electrode 410 is formed, the anode electrode 410 may be formed using a light transmitting conductive film have. The light transmitting conductive film may be an ITO (Indium Tin Oxide) film or an IZO (Indium Zinc Oxide) film.

Next, a pixel defining layer (PDL) 350 is formed on the entire surface of the lower substrate on the anode electrode 410. The pixel defining layer 350 may be formed using BCB (benzocyclobutene), acrylic photoresist, phenol photoresist, or imide photoresist.

The pixel defining layer 350 serves to separate neighboring pixels. The pixel defining layer 350 is formed in the pixel defining layer 245 by using a method such as etching to expose a part of the anode electrode 410, that is, And an organic light emitting layer 420 is formed on the anode electrode 410 exposed in the opening 180.

The organic light emitting layer 420 may be formed using a vacuum deposition method, an inkjet printing method, or a laser thermal transfer method. Further, a hole injecting layer, a hole transporting layer, a hole blocking layer, an electron transporting layer, or an electron injecting layer may be formed on the upper or lower part of the organic light emitting layer 420.

A cathode electrode 430 is formed on the entire surface of the substrate including the organic emission layer 420 and the pixel defining layer 350. The cathode electrode 430 is preferably formed of a transparent conductive film. The transparent conductive film may be an ITO film or an IZO film, or may be Mg, Ca, Al, Ag, Ba, or an alloy thereof having a thickness enough to transmit light.

That is, an organic light emitting diode (OLED) 400 is formed for each pixel through a stacked structure of the cathode electrode 410, the organic light emitting layer 420, and the cathode electrode 430.

Also, the organic light emitting diode (OLED) 400 is sealed by the upper substrate 200, and the upper substrate 200 is referred to as an encapsulation substrate.

1 through 3, the sensing electrodes (first electrodes) 212 of the touch screen panel are formed on one surface of the upper substrate 200, and the sensing electrodes The initialization drive control lines 112 are used as driving electrodes of the touch screen panel to realize an organic light emitting display device in which a touch screen panel with a small thickness is incorporated without further processing do.

The distance between the first electrodes 212 as the sensing electrodes formed on the upper substrate 200 and the initialization drive control lines 112 as the driving electrodes formed on the lower substrate 100 is long and the initialization drive control lines 112 may be too small as compared with the sensing electrodes 212, so that the touch recognition sensitivity may be degraded.

In order to overcome this problem, in the embodiment of the present invention, as shown in FIG. 4, the initialization drive control lines 112 used as the drive electrodes are arranged close to the sense electrodes 212, The initialization drive control lines 112 are electrically connected to auxiliary wirings 112a having a width wider than the control lines 112. The auxiliary wirings 112a ) Is used.

More specifically, referring to FIG. 4, a second via hole (not shown) is formed in the insulating films formed on the region overlapping the initialization drive control line 112, that is, the interlayer insulating film 320, the passivation film 330, 160, which expose the initialization drive control line 112.

The auxiliary wiring 112a is formed on the planarization layer 340 including the second via hole 160 so as to be electrically connected to the exposed initialization drive control line 112. [

At this time, the auxiliary wiring 112a is formed on the same layer as the anode electrode 410 of the organic light emitting diode OLED described above, and may be formed of the same material as the anode electrode 420.

However, the auxiliary wiring 112a is electrically separated from the anode electrode 410 and may be formed in a region overlapping the pixel defining layer 350. Referring to FIG.

Therefore, the auxiliary wiring 112a is electrically connected to the initialization driving control line 112 used as a driving electrode of the touch screen panel irrespective of the image display operation of the organic light emitting display, and the distance from the sensing electrode 212 formed on the upper substrate 200 is made closer to improve the touch recognition sensitivity.

4, the auxiliary wiring 112a is formed on a region overlapping the initialization driving control line 112. The width of the auxiliary wiring 112a is wider than that of the initialization driving control line 112. However, The embodiment is not limited thereto. That is, the auxiliary wiring 112a may be formed in various shapes such as a mesh shape in addition to the stripe shape.

More specifically, referring to FIG. 5A, an embodiment in which the auxiliary wiring 112a is implemented in a stripe shape wider than the initialization drive control line 112 is shown.

The auxiliary wiring 112 is arranged in a first direction (e.g., an X-axis direction) the same as the initialization drive control line on an area overlapping the initialization drive control line 112, and the auxiliary wiring 112 is connected to the anode of the organic light emitting diode OLED Is formed on the same layer as the electrode (410).

That is, the auxiliary wiring 112 is arranged in a direction intersecting with the first electrode (212 in FIG. 1) as the sensing electrode of the touch screen panel, and the scanning line (FIG. 1 And may be arranged in parallel with each other.

In addition, the embodiment shown in FIG. 5B has a structure for widening the area of the auxiliary wiring 112a. As shown in FIG. 5A, when compared with the embodiment shown in FIG. 5A, 112a 'may further include at least one protrusion 112b protruding from a region between the anode electrodes 410. [

At this time, the protrusions 112b are protruded in a second direction perpendicular to the first direction (for example, Y-axis direction), and the anode electrodes 410 are separated from each other by pixel regions The protrusions 112b of the auxiliary lines 112a 'may be further formed in a region between the separated anode electrodes 410. [

The initialization driving control lines 112 used as driving electrodes of the touch screen panel and the auxiliary wiring lines 112a electrically connected to the initialization driving control lines 112 are formed on the lower substrate 100 in a first direction And the sensing electrodes corresponding to the driving electrodes 112 and 112a may be formed on one surface of the upper substrate 200 in a second direction that intersects the first direction The first electrode 212 may be formed in a Y-axis direction.

At this time, the insulating layer and the upper substrate 200 provided between the driving electrodes 112 and 112a and the sensing electrodes 212 serve as a dielectric.

4, an organic light emitting diode (OLED) is formed on a driving electrode 112 and 112a formed on the lower substrate 100, The cathode electrode 430 is formed on the entire surface.

In this case, it is difficult to form an electric field between the drive electrodes formed by the initialization drive control lines 112 and the auxiliary wirings 112a and the sense electrodes 212 on the upper substrate 200. Therefore, in the embodiment of the present invention, An opening 170 is formed in a region of the cathode electrode 430 overlapping the auxiliary wiring line 112a so that the first and second wiring lines 112 and 112a are exposed.

The mutual capacitance C _M between the driving electrodes 112 and 112a and the sensing electrode 212 is determined by the arrangement of the driving electrodes 112 and 112a and the sensing electrodes 212, And each intersection where the mutual capacitance is formed serves as each sensing cell for realizing touch recognition.

The mutual capacitance generated in each sensing cell may be detected by coupling to the sensing electrode 212 connected to each sensing cell when a driving signal is applied to the driving electrode 112 or 112a connected to the sensing cell, Signal.

As described above with reference to FIG. 3, driving signals are sequentially applied to the driving electrodes 112 and 112a for one frame period. That is, when a low-level initialization voltage Vint is applied as a driving signal to one of the driving electrodes, a high-level voltage is applied to all the other driving electrodes.

Accordingly, each mutual capacitance is formed in a plurality of intersection points, that is, sense cells, of the plurality of sensing electrodes 212 crossing the driving electrodes 112 and 112a to which the driving signals are applied, When a finger or the like is brought into contact with the cells, a change in the capacitance of the corresponding sense cell is generated and can be detected.

According to the above-described structure, an embodiment of the present invention can realize an organic light emitting display device having a touch screen panel of mutual capacitance type.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be apparent to those skilled in the art that various modifications may be made without departing from the scope of the present invention.

100: lower substrate 112: initialization drive control line
112a: auxiliary wiring 114: scanning line
116: Data line 118: Driving pad part
119a: first touch pad part 119b: second touch pad part
120: pixel 212: sensing electrode (first electrode)
214: sensing line 400: organic light emitting diode
410: anode electrode 420: organic light emitting layer
430: cathode electrode

Claims (18)

A first substrate on which a plurality of pixels, a plurality of signal lines and control lines connected to the pixels, are arranged;
A second substrate positioned on the first substrate to seal the first substrate and having first electrodes of the touch screen panel arranged on one surface thereof;
And auxiliary wires electrically connected to the control wires and formed at positions closer to the first electrodes than the control wires,
Wherein the control lines and the auxiliary lines are arranged in a direction intersecting with the first electrodes to act as second electrodes of the touch screen panel. The method according to claim 1,
Wherein the auxiliary wirings are formed to have a wider width than the control lines electrically connected to the auxiliary wirings. The method according to claim 1,
Wherein the auxiliary wirings are formed on the same layer as the anode electrode of the organic light emitting diode provided in the pixel. The method of claim 3,
Wherein the auxiliary wirings are formed of the same material as the anode electrode. The method according to claim 1,
Wherein the auxiliary wirings are formed separately from the anode electrode. 6. The method of claim 5,
Wherein the auxiliary wirings are further formed with at least one protrusion protruding into a region between the anode electrodes. The method according to claim 1,
Wherein the plurality of control lines constitute a group of adjacent control lines and the plurality of control lines constituting the group operate as a second electrode of the touch screen panel, . The method according to claim 1,
Wherein the first electrode is a sensing electrode of the touch screen panel, and the second electrode is a driving electrode of the touch screen panel. The method according to claim 1,
Wherein the first electrodes are formed on a display region of a second substrate corresponding to an area where the pixels are formed. 10. The method of claim 9,
And a sensing line connecting the first electrodes to a touch driving circuit through a first touch pad unit on a non-display area located outside the display area. 8. The method of claim 7,
Wherein the control lines are connected to the touch driving circuit through a second touch pad portion formed on a non-display region of the first substrate. 11. The method of claim 10,
Wherein the first touch pad portion formed on the second substrate is connected to the same touch driving circuit as the second touch pad portion formed on the first substrate. The method according to claim 1,
Wherein the control lines are initialization drive control lines for providing an initialization voltage to each pixel. The method according to claim 1,
Each of the pixels includes:
An organic light emitting diode;
A first transistor for controlling the amount of current supplied to the organic light emitting diode and for initializing a voltage of the gate electrode by an initialization voltage;
And a second transistor connected between a gate electrode of the first transistor and a control line providing an initialization voltage. 15. The method of claim 14,
Wherein the initialization voltage applied to the control line is a low-level voltage lower than a data signal applied to each pixel. 16. The method of claim 15,
Wherein the initialization voltage is sequentially applied to each of a plurality of control lines operating as a second electrode of the touch screen panel. 17. The method of claim 16,
Wherein a voltage of a high level is similarly applied to groups of a plurality of control lines other than the group of the plurality of control lines to which the initialization voltage is applied. 15. The method of claim 14,
The cathode electrode of the organic light emitting diode provided between the plurality of auxiliary wirings arranged on the first substrate and the first electrodes formed on one surface of the second substrate is overlapped with the auxiliary wirings to expose the auxiliary wirings And an opening is formed in a region where the organic EL device is formed.

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